Merged changes in the trunk up to revision 52191.

[blender-staging.git] / source / blender / render / intern / source / pipeline.c

/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version. 
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2006 Blender Foundation.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/** \file blender/render/intern/source/pipeline.c
 *  \ingroup render
 */

#include <math.h>
#include <limits.h>
#include <string.h>
#include <stdlib.h>
#include <stddef.h>

#include "DNA_group_types.h"
#include "DNA_image_types.h"
#include "DNA_node_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "DNA_sequence_types.h"
#include "DNA_userdef_types.h"

#include "MEM_guardedalloc.h"

#include "BKE_animsys.h"  /* <------ should this be here?, needed for sequencer update */
#include "BKE_camera.h"
#include "BKE_global.h"
#include "BKE_image.h"
#include "BKE_library.h"
#include "BKE_main.h"
#include "BKE_node.h"
#include "BKE_pointcache.h"
#include "BKE_report.h"
#include "BKE_scene.h"
#include "BKE_sequencer.h"
#include "BKE_writeavi.h"  /* <------ should be replaced once with generic movie module */

#include "BLI_math.h"
#include "BLI_rect.h"
#include "BLI_listbase.h"
#include "BLI_string.h"
#include "BLI_path_util.h"
#include "BLI_fileops.h"
#include "BLI_rand.h"
#include "BLI_callbacks.h"

#include "PIL_time.h"
#include "IMB_colormanagement.h"
#include "IMB_imbuf.h"
#include "IMB_imbuf_types.h"

#include "RE_engine.h"
#include "RE_pipeline.h"

#include "FRS_freestyle.h"

/* internal */
#include "render_result.h"
#include "render_types.h"
#include "renderpipeline.h"
#include "renderdatabase.h"
#include "rendercore.h"
#include "initrender.h"
#include "shadbuf.h"
#include "pixelblending.h"
#include "zbuf.h"

/* render flow
 *
 * 1) Initialize state
 * - state data, tables
 * - movie/image file init
 * - everything that doesn't change during animation
 *
 * 2) Initialize data
 * - camera, world, matrices
 * - make render verts, faces, halos, strands
 * - everything can change per frame/field
 *
 * 3) Render Processor
 * - multiple layers
 * - tiles, rect, baking
 * - layers/tiles optionally to disk or directly in Render Result
 *
 * 4) Composite Render Result
 * - also read external files etc
 *
 * 5) Image Files
 * - save file or append in movie
 *
 */


/* ********* globals ******** */

/* here we store all renders */
static struct {
        ListBase renderlist;

        /* commandline thread override */
        int threads;
} RenderGlobal = {{NULL, NULL}, -1}; 

/* hardcopy of current render, used while rendering for speed */
Render R;

/* ********* alloc and free ******** */

static int do_write_image_or_movie(Render *re, Main *bmain, Scene *scene, bMovieHandle *mh, const char *name_override);

static volatile int g_break = 0;
static int thread_break(void *UNUSED(arg))
{
        return g_break;
}

/* default callbacks, set in each new render */
static void result_nothing(void *UNUSED(arg), RenderResult *UNUSED(rr)) {}
static void result_rcti_nothing(void *UNUSED(arg), RenderResult *UNUSED(rr), volatile struct rcti *UNUSED(rect)) {}
static void stats_nothing(void *UNUSED(arg), RenderStats *UNUSED(rs)) {}
static void float_nothing(void *UNUSED(arg), float UNUSED(val)) {}
static int default_break(void *UNUSED(arg)) { return G.is_break == TRUE; }

static void stats_background(void *UNUSED(arg), RenderStats *rs)
{
        uintptr_t mem_in_use, mmap_in_use, peak_memory;
        float megs_used_memory, mmap_used_memory, megs_peak_memory;

        mem_in_use = MEM_get_memory_in_use();
        mmap_in_use = MEM_get_mapped_memory_in_use();
        peak_memory = MEM_get_peak_memory();

        megs_used_memory = (mem_in_use - mmap_in_use) / (1024.0 * 1024.0);
        mmap_used_memory = (mmap_in_use) / (1024.0 * 1024.0);
        megs_peak_memory = (peak_memory) / (1024.0 * 1024.0);

        fprintf(stdout, "Fra:%d Mem:%.2fM (%.2fM, peak %.2fM) ", rs->cfra,
                megs_used_memory, mmap_used_memory, megs_peak_memory);

        if (rs->curfield)
                fprintf(stdout, "Field %d ", rs->curfield);
        if (rs->curblur)
                fprintf(stdout, "Blur %d ", rs->curblur);

        if (rs->infostr) {
                fprintf(stdout, "| %s", rs->infostr);
        }
        else {
                if (rs->tothalo)
                        fprintf(stdout, "Sce: %s Ve:%d Fa:%d Ha:%d La:%d", rs->scene_name, rs->totvert, rs->totface, rs->tothalo, rs->totlamp);
                else
                        fprintf(stdout, "Sce: %s Ve:%d Fa:%d La:%d", rs->scene_name, rs->totvert, rs->totface, rs->totlamp);
        }

        BLI_callback_exec(G.main, NULL, BLI_CB_EVT_RENDER_STATS);

        fputc('\n', stdout);
        fflush(stdout);
}

void RE_FreeRenderResult(RenderResult *res)
{
        render_result_free(res);
}

float *RE_RenderLayerGetPass(RenderLayer *rl, int passtype)
{
        RenderPass *rpass;
        
        for (rpass = rl->passes.first; rpass; rpass = rpass->next)
                if (rpass->passtype == passtype)
                        return rpass->rect;
        return NULL;
}

RenderLayer *RE_GetRenderLayer(RenderResult *rr, const char *name)
{
        if (rr == NULL) {
                return NULL;
        }
        else {
                return BLI_findstring(&rr->layers, name, offsetof(RenderLayer, name));
        }
}

RenderResult *RE_MultilayerConvert(void *exrhandle, const char *colorspace, int predivide, int rectx, int recty)
{
        return render_result_new_from_exr(exrhandle, colorspace, predivide, rectx, recty);
}

RenderLayer *render_get_active_layer(Render *re, RenderResult *rr)
{
        RenderLayer *rl = BLI_findlink(&rr->layers, re->r.actlay);
        
        if (rl)
                return rl;
        else 
                return rr->layers.first;
}

static int render_scene_needs_vector(Render *re)
{
        SceneRenderLayer *srl;
        
        for (srl = re->scene->r.layers.first; srl; srl = srl->next)
                if (!(srl->layflag & SCE_LAY_DISABLE))
                        if (srl->passflag & SCE_PASS_VECTOR)
                                return 1;

        return 0;
}

/* *************************************************** */

Render *RE_GetRender(const char *name)
{
        Render *re;

        /* search for existing renders */
        for (re = RenderGlobal.renderlist.first; re; re = re->next)
                if (strncmp(re->name, name, RE_MAXNAME) == 0)
                        break;

        return re;
}


/* if you want to know exactly what has been done */
RenderResult *RE_AcquireResultRead(Render *re)
{
        if (re) {
                BLI_rw_mutex_lock(&re->resultmutex, THREAD_LOCK_READ);
                return re->result;
        }

        return NULL;
}

RenderResult *RE_AcquireResultWrite(Render *re)
{
        if (re) {
                BLI_rw_mutex_lock(&re->resultmutex, THREAD_LOCK_WRITE);
                return re->result;
        }

        return NULL;
}

void RE_SwapResult(Render *re, RenderResult **rr)
{
        /* for keeping render buffers */
        if (re) {
                SWAP(RenderResult *, re->result, *rr);
        }
}


void RE_ReleaseResult(Render *re)
{
        if (re)
                BLI_rw_mutex_unlock(&re->resultmutex);
}

/* displist.c util.... */
Scene *RE_GetScene(Render *re)
{
        if (re)
                return re->scene;
        return NULL;
}

/* fill provided result struct with what's currently active or done */
void RE_AcquireResultImage(Render *re, RenderResult *rr)
{
        memset(rr, 0, sizeof(RenderResult));

        if (re) {
                BLI_rw_mutex_lock(&re->resultmutex, THREAD_LOCK_READ);

                if (re->result) {
                        RenderLayer *rl;
                        
                        rr->rectx = re->result->rectx;
                        rr->recty = re->result->recty;
                        
                        rr->rectf = re->result->rectf;
                        rr->rectz = re->result->rectz;
                        rr->rect32 = re->result->rect32;
                        
                        /* active layer */
                        rl = render_get_active_layer(re, re->result);

                        if (rl) {
                                if (rr->rectf == NULL)
                                        rr->rectf = rl->rectf;
                                if (rr->rectz == NULL)
                                        rr->rectz = RE_RenderLayerGetPass(rl, SCE_PASS_Z);
                        }

                        rr->have_combined = (re->result->rectf != NULL);
                        rr->layers = re->result->layers;
                }
        }
}

void RE_ReleaseResultImage(Render *re)
{
        if (re)
                BLI_rw_mutex_unlock(&re->resultmutex);
}

/* caller is responsible for allocating rect in correct size! */
void RE_ResultGet32(Render *re, unsigned int *rect)
{
        RenderResult rres;
        
        RE_AcquireResultImage(re, &rres);
        render_result_rect_get_pixels(&rres, &re->r, rect, re->rectx, re->recty, &re->scene->view_settings, &re->scene->display_settings);
        RE_ReleaseResultImage(re);
}

RenderStats *RE_GetStats(Render *re)
{
        return &re->i;
}

Render *RE_NewRender(const char *name)
{
        Render *re;

        /* only one render per name exists */
        re = RE_GetRender(name);
        if (re == NULL) {
                
                /* new render data struct */
                re = MEM_callocN(sizeof(Render), "new render");
                BLI_addtail(&RenderGlobal.renderlist, re);
                BLI_strncpy(re->name, name, RE_MAXNAME);
                BLI_rw_mutex_init(&re->resultmutex);
        }
        
        RE_InitRenderCB(re);

        /* init some variables */
        re->ycor = 1.0f;
        
        return re;
}

/* called for new renders and when finishing rendering so
 * we always have valid callbacks on a render */
void RE_InitRenderCB(Render *re)
{
        /* set default empty callbacks */
        re->display_init = result_nothing;
        re->display_clear = result_nothing;
        re->display_draw = result_rcti_nothing;
        re->progress = float_nothing;
        re->test_break = default_break;
        if (G.background)
                re->stats_draw = stats_background;
        else
                re->stats_draw = stats_nothing;
        /* clear callback handles */
        re->dih = re->dch = re->ddh = re->sdh = re->prh = re->tbh = NULL;
}

/* only call this while you know it will remove the link too */
void RE_FreeRender(Render *re)
{
        if (re->engine)
                RE_engine_free(re->engine);

        BLI_rw_mutex_end(&re->resultmutex);
        
        free_renderdata_tables(re);
        free_sample_tables(re);
        
        render_result_free(re->result);
        render_result_free(re->pushedresult);
        
        BLI_remlink(&RenderGlobal.renderlist, re);
        MEM_freeN(re);
}

/* exit blender */
void RE_FreeAllRender(void)
{
        while (RenderGlobal.renderlist.first) {
                RE_FreeRender(RenderGlobal.renderlist.first);
        }
}

/* on file load, free all re */
void RE_FreeAllRenderResults(void)
{
        Render *re;

        for (re = RenderGlobal.renderlist.first; re; re = re->next) {
                render_result_free(re->result);
                render_result_free(re->pushedresult);

                re->result = NULL;
                re->pushedresult = NULL;
        }
}

void RE_FreePersistentData(void)
{
        Render *re;

        /* render engines can be kept around for quick re-render, this clears all */
        for (re = RenderGlobal.renderlist.first; re; re = re->next) {
                if (re->engine) {
                        /* if engine is currently rendering, just tag it to be freed when render is finished */
                        if (!(re->engine->flag & RE_ENGINE_RENDERING))
                                RE_engine_free(re->engine);

                        re->engine = NULL;
                }
        }
}

/* ********* initialize state ******** */


/* what doesn't change during entire render sequence */
/* disprect is optional, if NULL it assumes full window render */
void RE_InitState(Render *re, Render *source, RenderData *rd, SceneRenderLayer *srl, int winx, int winy, rcti *disprect)
{
        re->ok = TRUE;   /* maybe flag */
        
        re->i.starttime = PIL_check_seconds_timer();
        re->r = *rd;     /* hardcopy */
        
        re->winx = winx;
        re->winy = winy;
        if (disprect) {
                re->disprect = *disprect;
                re->rectx = BLI_rcti_size_x(disprect);
                re->recty = BLI_rcti_size_y(disprect);
        }
        else {
                re->disprect.xmin = re->disprect.ymin = 0;
                re->disprect.xmax = winx;
                re->disprect.ymax = winy;
                re->rectx = winx;
                re->recty = winy;
        }
        
        if (re->rectx < 2 || re->recty < 2 || (BKE_imtype_is_movie(rd->im_format.imtype) &&
                                               (re->rectx < 16 || re->recty < 16) ))
        {
                BKE_report(re->reports, RPT_ERROR, "Image too small");
                re->ok = 0;
                return;
        }

        if ((re->r.mode & (R_OSA)) == 0)
                re->r.scemode &= ~R_FULL_SAMPLE;

#ifdef WITH_OPENEXR
        if (re->r.scemode & R_FULL_SAMPLE)
                re->r.scemode |= R_EXR_TILE_FILE;   /* enable automatic */

        /* Until use_border is made compatible with save_buffers/full_sample, render without the later instead of not rendering at all.*/
        if (re->r.mode & R_BORDER) {
                re->r.scemode &= ~(R_EXR_TILE_FILE | R_FULL_SAMPLE);
        }

#else
        /* can't do this without openexr support */
        re->r.scemode &= ~(R_EXR_TILE_FILE | R_FULL_SAMPLE);
#endif
        
        /* fullsample wants uniform osa levels */
        if (source && (re->r.scemode & R_FULL_SAMPLE)) {
                /* but, if source has no full sample we disable it */
                if ((source->r.scemode & R_FULL_SAMPLE) == 0)
                        re->r.scemode &= ~R_FULL_SAMPLE;
                else
                        re->r.osa = re->osa = source->osa;
        }
        else {
                /* check state variables, osa? */
                if (re->r.mode & (R_OSA)) {
                        re->osa = re->r.osa;
                        if (re->osa > 16) re->osa = 16;
                }
                else re->osa = 0;
        }
        
        if (srl) {
                int index = BLI_findindex(&re->r.layers, srl);
                if (index != -1) {
                        re->r.actlay = index;
                        re->r.scemode |= R_SINGLE_LAYER;
                }
        }
                
        /* always call, checks for gamma, gamma tables and jitter too */
        make_sample_tables(re);
        
        /* if preview render, we try to keep old result */
        BLI_rw_mutex_lock(&re->resultmutex, THREAD_LOCK_WRITE);

        if (re->r.scemode & R_PREVIEWBUTS) {
                if (re->result && re->result->rectx == re->rectx && re->result->recty == re->recty) {
                        /* pass */
                }
                else {
                        render_result_free(re->result);
                        re->result = NULL;
                }
        }
        else {
                
                /* make empty render result, so display callbacks can initialize */
                render_result_free(re->result);
                re->result = MEM_callocN(sizeof(RenderResult), "new render result");
                re->result->rectx = re->rectx;
                re->result->recty = re->recty;
        }

        BLI_rw_mutex_unlock(&re->resultmutex);
        
        /* we clip faces with a minimum of 2 pixel boundary outside of image border. see zbuf.c */
        re->clipcrop = 1.0f + 2.0f / (float)(re->winx > re->winy ? re->winy : re->winx);
        
        re->mblur_offs = re->field_offs = 0.f;
        
        RE_init_threadcount(re);
}

void RE_SetWindow(Render *re, rctf *viewplane, float clipsta, float clipend)
{
        /* re->ok flag? */
        
        re->viewplane = *viewplane;
        re->clipsta = clipsta;
        re->clipend = clipend;
        re->r.mode &= ~R_ORTHO;

        perspective_m4(re->winmat,
                       re->viewplane.xmin, re->viewplane.xmax,
                       re->viewplane.ymin, re->viewplane.ymax, re->clipsta, re->clipend);
        
}

void RE_SetOrtho(Render *re, rctf *viewplane, float clipsta, float clipend)
{
        /* re->ok flag? */
        
        re->viewplane = *viewplane;
        re->clipsta = clipsta;
        re->clipend = clipend;
        re->r.mode |= R_ORTHO;

        orthographic_m4(re->winmat,
                        re->viewplane.xmin, re->viewplane.xmax,
                        re->viewplane.ymin, re->viewplane.ymax, re->clipsta, re->clipend);
}

void RE_SetView(Render *re, float mat[][4])
{
        /* re->ok flag? */
        copy_m4_m4(re->viewmat, mat);
        invert_m4_m4(re->viewinv, re->viewmat);
}

/* image and movie output has to move to either imbuf or kernel */
void RE_display_init_cb(Render *re, void *handle, void (*f)(void *handle, RenderResult *rr))
{
        re->display_init = f;
        re->dih = handle;
}
void RE_display_clear_cb(Render *re, void *handle, void (*f)(void *handle, RenderResult *rr))
{
        re->display_clear = f;
        re->dch = handle;
}
void RE_display_draw_cb(Render *re, void *handle, void (*f)(void *handle, RenderResult *rr, volatile rcti *rect))
{
        re->display_draw = f;
        re->ddh = handle;
}
void RE_stats_draw_cb(Render *re, void *handle, void (*f)(void *handle, RenderStats *rs))
{
        re->stats_draw = f;
        re->sdh = handle;
}
void RE_progress_cb(Render *re, void *handle, void (*f)(void *handle, float))
{
        re->progress = f;
        re->prh = handle;
}

void RE_draw_lock_cb(Render *re, void *handle, void (*f)(void *handle, int i))
{
        re->draw_lock = f;
        re->tbh = handle;
}

void RE_test_break_cb(Render *re, void *handle, int (*f)(void *handle))
{
        re->test_break = f;
        re->tbh = handle;
}


/* ********* add object data (later) ******** */

/* object is considered fully prepared on correct time etc */
/* includes lights */
#if 0
void RE_AddObject(Render *UNUSED(re), Object *UNUSED(ob))
{
        
}
#endif

/* *************************************** */

static int render_display_draw_enabled(Render *re)
{
        /* don't show preprocess for previewrender sss */
        if (re->sss_points)
                return !(re->r.scemode & R_PREVIEWBUTS);
        else
                return 1;
}

/* the main thread call, renders an entire part */
static void *do_part_thread(void *pa_v)
{
        RenderPart *pa = pa_v;
        
        /* need to return nicely all parts on esc */
        if (R.test_break(R.tbh) == 0) {
                
                if (!R.sss_points && (R.r.scemode & R_FULL_SAMPLE))
                        pa->result = render_result_new_full_sample(&R, &pa->fullresult, &pa->disprect, pa->crop, RR_USE_MEM);
                else
                        pa->result = render_result_new(&R, &pa->disprect, pa->crop, RR_USE_MEM, RR_ALL_LAYERS);

                if (R.sss_points)
                        zbufshade_sss_tile(pa);
                else if (R.osa)
                        zbufshadeDA_tile(pa);
                else
                        zbufshade_tile(pa);
                
                /* merge too on break! */
                if (R.result->do_exr_tile) {
                        render_result_exr_file_merge(R.result, pa->result);
                }
                else if (render_display_draw_enabled(&R)) {
                        /* on break, don't merge in result for preview renders, looks nicer */
                        if (R.test_break(R.tbh) && (R.r.scemode & R_PREVIEWBUTS)) {
                                /* pass */
                        }
                        else {
                                render_result_merge(R.result, pa->result);
                        }
                }
        }
        
        pa->ready = 1;
        
        return NULL;
}

/* calculus for how much 1 pixel rendered should rotate the 3d geometry */
/* is not that simple, needs to be corrected for errors of larger viewplane sizes */
/* called in initrender.c, initparts() and convertblender.c, for speedvectors */
float panorama_pixel_rot(Render *re)
{
        float psize, phi, xfac;
        float borderfac = (float)BLI_rcti_size_x(&re->disprect) / (float)re->winx;
        int xparts = (re->rectx + re->partx - 1) / re->partx;
        
        /* size of 1 pixel mapped to viewplane coords */
        psize = BLI_rctf_size_x(&re->viewplane) / (float)re->winx;
        /* angle of a pixel */
        phi = atan(psize / re->clipsta);
        
        /* correction factor for viewplane shifting, first calculate how much the viewplane angle is */
        xfac = borderfac * BLI_rctf_size_x(&re->viewplane) / (float)xparts;
        xfac = atan(0.5f * xfac / re->clipsta);
        /* and how much the same viewplane angle is wrapped */
        psize = 0.5f * phi * ((float)re->partx);
        
        /* the ratio applied to final per-pixel angle */
        phi *= xfac / psize;
        
        return phi;
}

/* call when all parts stopped rendering, to find the next Y slice */
/* if slice found, it rotates the dbase */
static RenderPart *find_next_pano_slice(Render *re, int *minx, rctf *viewplane)
{
        RenderPart *pa, *best = NULL;
        
        *minx = re->winx;
        
        /* most left part of the non-rendering parts */
        for (pa = re->parts.first; pa; pa = pa->next) {
                if (pa->ready == 0 && pa->nr == 0) {
                        if (pa->disprect.xmin < *minx) {
                                best = pa;
                                *minx = pa->disprect.xmin;
                        }
                }
        }
                        
        if (best) {
                float phi = panorama_pixel_rot(re);

                R.panodxp = (re->winx - (best->disprect.xmin + best->disprect.xmax) ) / 2;
                R.panodxv = (BLI_rctf_size_x(viewplane) * R.panodxp) / (float)(re->winx);
                
                /* shift viewplane */
                R.viewplane.xmin = viewplane->xmin + R.panodxv;
                R.viewplane.xmax = viewplane->xmax + R.panodxv;
                RE_SetWindow(re, &R.viewplane, R.clipsta, R.clipend);
                copy_m4_m4(R.winmat, re->winmat);
                
                /* rotate database according to part coordinates */
                project_renderdata(re, projectverto, 1, -R.panodxp * phi, 1);
                R.panosi = sin(R.panodxp * phi);
                R.panoco = cos(R.panodxp * phi);
        }
        return best;
}

static RenderPart *find_next_part(Render *re, int minx)
{
        RenderPart *pa, *best = NULL;

        /* long long int's needed because of overflow [#24414] */
        long long int centx = re->winx / 2, centy = re->winy / 2, tot = 1;
        long long int mindist = (long long int)re->winx * (long long int)re->winy;
        
        /* find center of rendered parts, image center counts for 1 too */
        for (pa = re->parts.first; pa; pa = pa->next) {
                if (pa->ready) {
                        centx += BLI_rcti_cent_x(&pa->disprect);
                        centy += BLI_rcti_cent_y(&pa->disprect);
                        tot++;
                }
        }
        centx /= tot;
        centy /= tot;
        
        /* closest of the non-rendering parts */
        for (pa = re->parts.first; pa; pa = pa->next) {
                if (pa->ready == 0 && pa->nr == 0) {
                        long long int distx = centx - BLI_rcti_cent_x(&pa->disprect);
                        long long int disty = centy - BLI_rcti_cent_y(&pa->disprect);
                        distx = (long long int)sqrt(distx * distx + disty * disty);
                        if (distx < mindist) {
                                if (re->r.mode & R_PANORAMA) {
                                        if (pa->disprect.xmin == minx) {
                                                best = pa;
                                                mindist = distx;
                                        }
                                }
                                else {
                                        best = pa;
                                        mindist = distx;
                                }
                        }
                }
        }
        return best;
}

static void print_part_stats(Render *re, RenderPart *pa)
{
        char str[64];
        
        BLI_snprintf(str, sizeof(str), "%s, Part %d-%d", re->scene->id.name + 2, pa->nr, re->i.totpart);
        re->i.infostr = str;
        re->stats_draw(re->sdh, &re->i);
        re->i.infostr = NULL;
}

static void threaded_tile_processor(Render *re)
{
        ListBase threads;
        RenderPart *pa, *nextpa;
        rctf viewplane = re->viewplane;
        int rendering = 1, counter = 1, drawtimer = 0, hasdrawn, minx = 0;
        
        BLI_rw_mutex_lock(&re->resultmutex, THREAD_LOCK_WRITE);

        /* first step; free the entire render result, make new, and/or prepare exr buffer saving */
        if (re->result == NULL || !(re->r.scemode & R_PREVIEWBUTS)) {
                render_result_free(re->result);
        
                if (re->sss_points && render_display_draw_enabled(re))
                        re->result = render_result_new(re, &re->disprect, 0, RR_USE_MEM, RR_ALL_LAYERS);
                else if (re->r.scemode & R_FULL_SAMPLE)
                        re->result = render_result_new_full_sample(re, &re->fullresult, &re->disprect, 0, RR_USE_EXR);
                else
                        re->result = render_result_new(re, &re->disprect, 0,
                                                       (re->r.scemode & R_EXR_TILE_FILE) ? RR_USE_EXR : RR_USE_MEM, RR_ALL_LAYERS);
        }

        BLI_rw_mutex_unlock(&re->resultmutex);
        
        if (re->result == NULL)
                return;
        
        /* warning; no return here without closing exr file */
        
        initparts(re, TRUE);

        if (re->result->do_exr_tile)
                render_result_exr_file_begin(re);
        
        BLI_init_threads(&threads, do_part_thread, re->r.threads);
        
        /* assuming no new data gets added to dbase... */
        R = *re;
        
        /* set threadsafe break */
        R.test_break = thread_break;
        
        /* timer loop demands to sleep when no parts are left, so we enter loop with a part */
        if (re->r.mode & R_PANORAMA)
                nextpa = find_next_pano_slice(re, &minx, &viewplane);
        else
                nextpa = find_next_part(re, 0);
        
        while (rendering) {
                
                if (re->test_break(re->tbh))
                        PIL_sleep_ms(50);
                else if (nextpa && BLI_available_threads(&threads)) {
                        drawtimer = 0;
                        nextpa->nr = counter++;  /* for nicest part, and for stats */
                        nextpa->thread = BLI_available_thread_index(&threads);   /* sample index */
                        BLI_insert_thread(&threads, nextpa);

                        nextpa = find_next_part(re, minx);
                }
                else if (re->r.mode & R_PANORAMA) {
                        if (nextpa == NULL && BLI_available_threads(&threads) == re->r.threads)
                                nextpa = find_next_pano_slice(re, &minx, &viewplane);
                        else {
                                PIL_sleep_ms(50);
                                drawtimer++;
                        }
                }
                else {
                        PIL_sleep_ms(50);
                        drawtimer++;
                }
                
                /* check for ready ones to display, and if we need to continue */
                rendering = 0;
                hasdrawn = 0;
                for (pa = re->parts.first; pa; pa = pa->next) {
                        if (pa->ready) {
                                
                                BLI_remove_thread(&threads, pa);
                                
                                if (pa->result) {
                                        if (render_display_draw_enabled(re))
                                                re->display_draw(re->ddh, pa->result, NULL);
                                        print_part_stats(re, pa);
                                        
                                        render_result_free_list(&pa->fullresult, pa->result);
                                        pa->result = NULL;
                                        re->i.partsdone++;
                                        re->progress(re->prh, re->i.partsdone / (float)re->i.totpart);
                                        hasdrawn = 1;
                                }
                        }
                        else {
                                rendering = 1;
                                if (pa->nr && pa->result && drawtimer > 20) {
                                        if (render_display_draw_enabled(re))
                                                re->display_draw(re->ddh, pa->result, &pa->result->renrect);
                                        hasdrawn = 1;
                                }
                        }
                }
                if (hasdrawn)
                        drawtimer = 0;

                /* on break, wait for all slots to get freed */
                if ( (g_break = re->test_break(re->tbh)) && BLI_available_threads(&threads) == re->r.threads)
                        rendering = 0;
                
        }
        
        if (re->result->do_exr_tile) {
                BLI_rw_mutex_lock(&re->resultmutex, THREAD_LOCK_WRITE);
                render_result_exr_file_end(re);
                BLI_rw_mutex_unlock(&re->resultmutex);
        }
        
        /* unset threadsafety */
        g_break = 0;
        
        BLI_end_threads(&threads);
        freeparts(re);
        re->viewplane = viewplane; /* restore viewplane, modified by pano render */
}

/* currently only called by preview renders and envmap */
void RE_TileProcessor(Render *re)
{
        threaded_tile_processor(re);
}

/* ************  This part uses API, for rendering Blender scenes ********** */

static void add_freestyle(Render *re);

static void do_render_3d(Render *re)
{
        /* try external */
        if (RE_engine_render(re, 0))
                return;

        /* internal */
        
//      re->cfra= cfra; /* <- unused! */
        re->scene->r.subframe = re->mblur_offs + re->field_offs;
        
        /* lock drawing in UI during data phase */
        if (re->draw_lock)
                re->draw_lock(re->dlh, 1);
        
        /* make render verts/faces/halos/lamps */
        if (render_scene_needs_vector(re))
                RE_Database_FromScene_Vectors(re, re->main, re->scene, re->lay);
        else
                RE_Database_FromScene(re, re->main, re->scene, re->lay, 1);
        
        /* clear UI drawing locks */
        if (re->draw_lock)
                re->draw_lock(re->dlh, 0);
        
        threaded_tile_processor(re);
        
        /* do left-over 3d post effects (flares) */
        if (re->flag & R_HALO)
                if (!re->test_break(re->tbh))
                        add_halo_flare(re);
        
        /* Freestyle  */
        if( re->r.mode & R_EDGE_FRS)
                if(!re->test_break(re->tbh))
                        add_freestyle(re);
                
        /* free all render verts etc */
        RE_Database_Free(re);
        
        re->scene->r.subframe = 0.f;
}

/* called by blur loop, accumulate RGBA key alpha */
static void addblur_rect_key(RenderResult *rr, float *rectf, float *rectf1, float blurfac)
{
        float mfac = 1.0f - blurfac;
        int a, b, stride = 4 * rr->rectx;
        int len = stride * sizeof(float);
        
        for (a = 0; a < rr->recty; a++) {
                if (blurfac == 1.0f) {
                        memcpy(rectf, rectf1, len);
                }
                else {
                        float *rf = rectf, *rf1 = rectf1;
                        
                        for (b = rr->rectx; b > 0; b--, rf += 4, rf1 += 4) {
                                if (rf1[3] < 0.01f)
                                        rf[3] = mfac * rf[3];
                                else if (rf[3] < 0.01f) {
                                        rf[0] = rf1[0];
                                        rf[1] = rf1[1];
                                        rf[2] = rf1[2];
                                        rf[3] = blurfac * rf1[3];
                                }
                                else {
                                        rf[0] = mfac * rf[0] + blurfac * rf1[0];
                                        rf[1] = mfac * rf[1] + blurfac * rf1[1];
                                        rf[2] = mfac * rf[2] + blurfac * rf1[2];
                                        rf[3] = mfac * rf[3] + blurfac * rf1[3];
                                }
                        }
                }
                rectf += stride;
                rectf1 += stride;
        }
}

/* called by blur loop, accumulate renderlayers */
static void addblur_rect(RenderResult *rr, float *rectf, float *rectf1, float blurfac, int channels)
{
        float mfac = 1.0f - blurfac;
        int a, b, stride = channels * rr->rectx;
        int len = stride * sizeof(float);
        
        for (a = 0; a < rr->recty; a++) {
                if (blurfac == 1.0f) {
                        memcpy(rectf, rectf1, len);
                }
                else {
                        float *rf = rectf, *rf1 = rectf1;
                        
                        for (b = rr->rectx * channels; b > 0; b--, rf++, rf1++) {
                                rf[0] = mfac * rf[0] + blurfac * rf1[0];
                        }
                }
                rectf += stride;
                rectf1 += stride;
        }
}


/* called by blur loop, accumulate renderlayers */
static void merge_renderresult_blur(RenderResult *rr, RenderResult *brr, float blurfac, int key_alpha)
{
        RenderLayer *rl, *rl1;
        RenderPass *rpass, *rpass1;
        
        rl1 = brr->layers.first;
        for (rl = rr->layers.first; rl && rl1; rl = rl->next, rl1 = rl1->next) {
                
                /* combined */
                if (rl->rectf && rl1->rectf) {
                        if (key_alpha)
                                addblur_rect_key(rr, rl->rectf, rl1->rectf, blurfac);
                        else
                                addblur_rect(rr, rl->rectf, rl1->rectf, blurfac, 4);
                }
                
                /* passes are allocated in sync */
                rpass1 = rl1->passes.first;
                for (rpass = rl->passes.first; rpass && rpass1; rpass = rpass->next, rpass1 = rpass1->next) {
                        addblur_rect(rr, rpass->rect, rpass1->rect, blurfac, rpass->channels);
                }
        }
}

/* main blur loop, can be called by fields too */
static void do_render_blur_3d(Render *re)
{
        RenderResult *rres;
        float blurfac;
        int blur = re->r.mblur_samples;
        
        /* create accumulation render result */
        rres = render_result_new(re, &re->disprect, 0, RR_USE_MEM, RR_ALL_LAYERS);
        
        /* do the blur steps */
        while (blur--) {
                re->mblur_offs = re->r.blurfac * ((float)(re->r.mblur_samples - blur)) / (float)re->r.mblur_samples;
                
                re->i.curblur = re->r.mblur_samples - blur;    /* stats */
                
                do_render_3d(re);
                
                blurfac = 1.0f / (float)(re->r.mblur_samples - blur);
                
                merge_renderresult_blur(rres, re->result, blurfac, re->r.alphamode & R_ALPHAKEY);
                if (re->test_break(re->tbh)) break;
        }
        
        /* swap results */
        BLI_rw_mutex_lock(&re->resultmutex, THREAD_LOCK_WRITE);
        render_result_free(re->result);
        re->result = rres;
        BLI_rw_mutex_unlock(&re->resultmutex);
        
        re->mblur_offs = 0.0f;
        re->i.curblur = 0;   /* stats */
        
        /* weak... the display callback wants an active renderlayer pointer... */
        re->result->renlay = render_get_active_layer(re, re->result);
        re->display_draw(re->ddh, re->result, NULL);
}


/* function assumes rectf1 and rectf2 to be half size of rectf */
static void interleave_rect(RenderResult *rr, float *rectf, float *rectf1, float *rectf2, int channels)
{
        int a, stride = channels * rr->rectx;
        int len = stride * sizeof(float);
        
        for (a = 0; a < rr->recty; a += 2) {
                memcpy(rectf, rectf1, len);
                rectf += stride;
                rectf1 += stride;
                memcpy(rectf, rectf2, len);
                rectf += stride;
                rectf2 += stride;
        }
}

/* merge render results of 2 fields */
static void merge_renderresult_fields(RenderResult *rr, RenderResult *rr1, RenderResult *rr2)
{
        RenderLayer *rl, *rl1, *rl2;
        RenderPass *rpass, *rpass1, *rpass2;
        
        rl1 = rr1->layers.first;
        rl2 = rr2->layers.first;
        for (rl = rr->layers.first; rl && rl1 && rl2; rl = rl->next, rl1 = rl1->next, rl2 = rl2->next) {
                
                /* combined */
                if (rl->rectf && rl1->rectf && rl2->rectf)
                        interleave_rect(rr, rl->rectf, rl1->rectf, rl2->rectf, 4);
                
                /* passes are allocated in sync */
                rpass1 = rl1->passes.first;
                rpass2 = rl2->passes.first;
                for (rpass = rl->passes.first;
                     rpass && rpass1 && rpass2;
                     rpass = rpass->next, rpass1 = rpass1->next, rpass2 = rpass2->next)
                {
                        interleave_rect(rr, rpass->rect, rpass1->rect, rpass2->rect, rpass->channels);
                }
        }
}


/* interleaves 2 frames */
static void do_render_fields_3d(Render *re)
{
        Object *camera = RE_GetCamera(re);
        RenderResult *rr1, *rr2 = NULL;
        
        /* no render result was created, we can safely halve render y */
        re->winy /= 2;
        re->recty /= 2;
        re->disprect.ymin /= 2;
        re->disprect.ymax /= 2;
        
        re->i.curfield = 1;  /* stats */
        
        /* first field, we have to call camera routine for correct aspect and subpixel offset */
        RE_SetCamera(re, camera);
        if (re->r.mode & R_MBLUR && (re->r.scemode & R_FULL_SAMPLE) == 0)
                do_render_blur_3d(re);
        else
                do_render_3d(re);

        BLI_rw_mutex_lock(&re->resultmutex, THREAD_LOCK_WRITE);
        rr1 = re->result;
        re->result = NULL;
        BLI_rw_mutex_unlock(&re->resultmutex);
        
        /* second field */
        if (!re->test_break(re->tbh)) {
                
                re->i.curfield = 2;  /* stats */
                
                re->flag |= R_SEC_FIELD;
                if ((re->r.mode & R_FIELDSTILL) == 0) {
                        re->field_offs = 0.5f;
                }
                RE_SetCamera(re, camera);
                if (re->r.mode & R_MBLUR && (re->r.scemode & R_FULL_SAMPLE) == 0)
                        do_render_blur_3d(re);
                else
                        do_render_3d(re);
                re->flag &= ~R_SEC_FIELD;
                
                re->field_offs = 0.0f;
                
                rr2 = re->result;
        }
        
        /* allocate original height new buffers */
        re->winy *= 2;
        re->recty *= 2;
        re->disprect.ymin *= 2;
        re->disprect.ymax *= 2;

        BLI_rw_mutex_lock(&re->resultmutex, THREAD_LOCK_WRITE);
        re->result = render_result_new(re, &re->disprect, 0, RR_USE_MEM, RR_ALL_LAYERS);

        if (rr2) {
                if (re->r.mode & R_ODDFIELD)
                        merge_renderresult_fields(re->result, rr2, rr1);
                else
                        merge_renderresult_fields(re->result, rr1, rr2);
                
                render_result_free(rr2);
        }

        render_result_free(rr1);
        
        re->i.curfield = 0;  /* stats */
        
        /* weak... the display callback wants an active renderlayer pointer... */
        re->result->renlay = render_get_active_layer(re, re->result);

        BLI_rw_mutex_unlock(&re->resultmutex);

        re->display_draw(re->ddh, re->result, NULL);
}

/* main render routine, no compositing */
static void do_render_fields_blur_3d(Render *re)
{
        Object *camera = RE_GetCamera(re);
        /* also check for camera here */
        if (camera == NULL) {
                printf("ERROR: Cannot render, no camera\n");
                G.is_break = TRUE;
                return;
        }

        /* now use renderdata and camera to set viewplane */
        RE_SetCamera(re, camera);
        
        if (re->r.mode & R_FIELDS)
                do_render_fields_3d(re);
        else if (re->r.mode & R_MBLUR && (re->r.scemode & R_FULL_SAMPLE) == 0)
                do_render_blur_3d(re);
        else
                do_render_3d(re);
        
        /* when border render, check if we have to insert it in black */
        if (re->result) {
                if (re->r.mode & R_BORDER) {
                        if ((re->r.mode & R_CROP) == 0) {
                                RenderResult *rres;
                                
                                BLI_rw_mutex_lock(&re->resultmutex, THREAD_LOCK_WRITE);

                                /* sub-rect for merge call later on */
                                re->result->tilerect = re->disprect;
                                
                                /* this copying sequence could become function? */
                                /* weak is: it chances disprect from border */
                                re->disprect.xmin = re->disprect.ymin = 0;
                                re->disprect.xmax = re->winx;
                                re->disprect.ymax = re->winy;
                                re->rectx = re->winx;
                                re->recty = re->winy;
                                
                                rres = render_result_new(re, &re->disprect, 0, RR_USE_MEM, RR_ALL_LAYERS);
                                
                                render_result_merge(rres, re->result);
                                render_result_free(re->result);
                                re->result = rres;
                                
                                /* weak... the display callback wants an active renderlayer pointer... */
                                re->result->renlay = render_get_active_layer(re, re->result);
                                
                                BLI_rw_mutex_unlock(&re->resultmutex);
                
                                re->display_init(re->dih, re->result);
                                re->display_draw(re->ddh, re->result, NULL);
                        }
                        else {
                                /* set offset (again) for use in compositor, disprect was manipulated. */
                                re->result->xof = 0;
                                re->result->yof = 0;
                        }
                }
        }
}


/* within context of current Render *re, render another scene.
 * it uses current render image size and disprect, but doesn't execute composite
 */
static void render_scene(Render *re, Scene *sce, int cfra)
{
        Render *resc = RE_NewRender(sce->id.name);
        int winx = re->winx, winy = re->winy;
        
        sce->r.cfra = cfra;

        BKE_scene_camera_switch_update(sce);

        /* exception: scene uses own size (unfinished code) */
        if (0) {
                winx = (sce->r.size * sce->r.xsch) / 100;
                winy = (sce->r.size * sce->r.ysch) / 100;
        }
        
        /* initial setup */
        RE_InitState(resc, re, &sce->r, NULL, winx, winy, &re->disprect);
        
        /* still unsure entity this... */
        resc->main = re->main;
        resc->scene = sce;
        resc->lay = sce->lay;
        
        /* ensure scene has depsgraph, base flags etc OK */
        BKE_scene_set_background(re->main, sce);

        /* copy callbacks */
        resc->display_draw = re->display_draw;
        resc->ddh = re->ddh;
        resc->test_break = re->test_break;
        resc->tbh = re->tbh;
        resc->stats_draw = re->stats_draw;
        resc->sdh = re->sdh;
        
        do_render_fields_blur_3d(resc);
}

/* helper call to detect if this scene needs a render, or if there's a any render layer to render */
static int composite_needs_render(Scene *sce, int this_scene)
{
        bNodeTree *ntree = sce->nodetree;
        bNode *node;
        
        if (ntree == NULL) return 1;
        if (sce->use_nodes == FALSE) return 1;
        if ((sce->r.scemode & R_DOCOMP) == 0) return 1;
        
        for (node = ntree->nodes.first; node; node = node->next) {
                if (node->type == CMP_NODE_R_LAYERS)
                        if (this_scene == 0 || node->id == NULL || node->id == &sce->id)
                                return 1;
        }
        return 0;
}

static void tag_scenes_for_render(Render *re)
{
        bNode *node;
        Scene *sce;
        
        for (sce = re->main->scene.first; sce; sce = sce->id.next)
                sce->id.flag &= ~LIB_DOIT;
        
        if (RE_GetCamera(re) && composite_needs_render(re->scene, 1))
                re->scene->id.flag |= LIB_DOIT;
        
        if (re->scene->nodetree == NULL) return;
        
        /* check for render-layers nodes using other scenes, we tag them LIB_DOIT */
        for (node = re->scene->nodetree->nodes.first; node; node = node->next) {
                if (node->type == CMP_NODE_R_LAYERS) {
                        if (node->id) {
                                if (node->id != (ID *)re->scene)
                                        node->id->flag |= LIB_DOIT;
                        }
                }
        }
        
}

static void ntree_render_scenes(Render *re)
{
        bNode *node;
        int cfra = re->scene->r.cfra;
        int restore_scene = 0;
        
        if (re->scene->nodetree == NULL) return;
        
        tag_scenes_for_render(re);
        
        /* now foreach render-result node tagged we do a full render */
        /* results are stored in a way compisitor will find it */
        for (node = re->scene->nodetree->nodes.first; node; node = node->next) {
                if (node->type == CMP_NODE_R_LAYERS) {
                        if (node->id && node->id != (ID *)re->scene) {
                                if (node->id->flag & LIB_DOIT) {
                                        Scene *scene = (Scene *)node->id;

                                        render_scene(re, scene, cfra);
                                        restore_scene = (scene != re->scene);
                                        node->id->flag &= ~LIB_DOIT;
                                        
                                        nodeUpdate(re->scene->nodetree, node);
                                }
                        }
                }
        }

        /* restore scene if we rendered another last */
        if (restore_scene)
                BKE_scene_set_background(re->main, re->scene);
}

/* bad call... need to think over proper method still */
static void render_composit_stats(void *UNUSED(arg), char *str)
{
        R.i.infostr = str;
        R.stats_draw(R.sdh, &R.i);
        R.i.infostr = NULL;
}

/* invokes Freestyle stroke rendering */
static void add_freestyle(Render *re)
{
        SceneRenderLayer *srl, *actsrl;
        LinkData *link;

        actsrl = BLI_findlink(&re->r.layers, re->r.actlay);

        FRS_init_stroke_rendering(re);

        for (srl= (SceneRenderLayer *)re->r.layers.first; srl; srl= srl->next) {

                link = (LinkData *)MEM_callocN(sizeof(LinkData), "LinkData to Freestyle render");
                BLI_addtail(&re->freestyle_renders, link);

                if ((re->r.scemode & R_SINGLE_LAYER) && srl != actsrl)
                        continue;
                if (FRS_is_freestyle_enabled(srl)) {
                        link->data = (void *)FRS_do_stroke_rendering(re, srl);
                }
        }

        FRS_finish_stroke_rendering(re);
}

/* merges the results of Freestyle stroke rendering into a given render result */
static void composite_freestyle_renders(Render *re, int sample)
{
        Render *freestyle_render;
        SceneRenderLayer *srl, *actsrl;
        LinkData *link;

        actsrl = BLI_findlink(&re->r.layers, re->r.actlay);

        link = (LinkData *)re->freestyle_renders.first;
        for (srl= (SceneRenderLayer *)re->r.layers.first; srl; srl= srl->next) {
                if ((re->r.scemode & R_SINGLE_LAYER) && srl != actsrl)
                        continue;
                if (FRS_is_freestyle_enabled(srl)) {
                        freestyle_render = (Render *)link->data;
                        render_result_exr_file_read(freestyle_render, sample);
                        FRS_composite_result(re, srl, freestyle_render);
                        RE_FreeRenderResult(freestyle_render->result);
                        freestyle_render->result = NULL;
                }
                link = link->next;
        }
}

/* releases temporary scenes and renders for Freestyle stroke rendering */
static void free_all_freestyle_renders(Scene *scene)
{
        Render *re1, *freestyle_render;
        LinkData *link;

        for (re1= RenderGlobal.renderlist.first; re1; re1= re1->next) {
                for (link = (LinkData *)re1->freestyle_renders.first; link; link = link->next) {
                        if (link->data) {
                                freestyle_render = (Render *)link->data;
                                BKE_scene_unlink(G.main, freestyle_render->scene, scene);
                                RE_FreeRender(freestyle_render);
                        }
                }
                BLI_freelistN( &re1->freestyle_renders );
        }
}


/* reads all buffers, calls optional composite, merges in first result->rectf */
static void do_merge_fullsample(Render *re, bNodeTree *ntree)
{
        float *rectf, filt[3][3];
        int x, y, sample;
        
        /* interaction callbacks */
        if (ntree) {
                ntree->stats_draw = render_composit_stats;
                ntree->test_break = re->test_break;
                ntree->progress = re->progress;
                ntree->sdh = re->sdh;
                ntree->tbh = re->tbh;
                ntree->prh = re->prh;
        }
        
        /* filtmask needs it */
        R = *re;
        
        /* we accumulate in here */
        rectf = MEM_mapallocN(re->rectx * re->recty * sizeof(float) * 4, "fullsample rgba");
        
        for (sample = 0; sample < re->r.osa; sample++) {
                Render *re1;
                RenderResult rres;
                int mask;
                
                /* enable full sample print */
                R.i.curfsa = sample + 1;
                
                /* set all involved renders on the samplebuffers (first was done by render itself, but needs tagged) */
                /* also function below assumes this */
                        
                tag_scenes_for_render(re);
                for (re1 = RenderGlobal.renderlist.first; re1; re1 = re1->next) {
                        if (re1->scene->id.flag & LIB_DOIT) {
                                if (re1->r.scemode & R_FULL_SAMPLE) {
                                        if (sample) {
                                                BLI_rw_mutex_lock(&re->resultmutex, THREAD_LOCK_WRITE);
                                                render_result_exr_file_read(re1, sample);
                                                if( re1->r.mode & R_EDGE_FRS)
                                                        composite_freestyle_renders(re1, sample);
                                                BLI_rw_mutex_unlock(&re->resultmutex);
                                        }
                                        ntreeCompositTagRender(re1->scene); /* ensure node gets exec to put buffers on stack */
                                }
                        }
                }
                
                /* composite */
                if (ntree) {
                        ntreeCompositTagRender(re->scene);
                        ntreeCompositTagAnimated(ntree);
                        
                        ntreeCompositExecTree(ntree, &re->r, 1, G.background == 0, &re->scene->view_settings, &re->scene->display_settings);
                }
                
                /* ensure we get either composited result or the active layer */
                RE_AcquireResultImage(re, &rres);
                
                /* accumulate with filter, and clip */
                mask = (1 << sample);
                mask_array(mask, filt);

                for (y = 0; y < re->recty; y++) {
                        float *rf = rectf + 4 * y * re->rectx;
                        float *col = rres.rectf + 4 * y * re->rectx;
                                
                        for (x = 0; x < re->rectx; x++, rf += 4, col += 4) {
                                /* clamping to 1.0 is needed for correct AA */
                                if (col[0] < 0.0f) col[0] = 0.0f; else if (col[0] > 1.0f) col[0] = 1.0f;
                                if (col[1] < 0.0f) col[1] = 0.0f; else if (col[1] > 1.0f) col[1] = 1.0f;
                                if (col[2] < 0.0f) col[2] = 0.0f; else if (col[2] > 1.0f) col[2] = 1.0f;
                                
                                add_filt_fmask_coord(filt, col, rf, re->rectx, re->recty, x, y);
                        }
                }
                
                RE_ReleaseResultImage(re);

                /* show stuff */
                if (sample != re->osa - 1) {
                        /* weak... the display callback wants an active renderlayer pointer... */
                        re->result->renlay = render_get_active_layer(re, re->result);
                        re->display_draw(re->ddh, re->result, NULL);
                }
                
                if (re->test_break(re->tbh))
                        break;
        }

        /* clamp alpha and RGB to 0..1 and 0..inf, can go outside due to filter */
        for (y = 0; y < re->recty; y++) {
                float *rf = rectf + 4 * y * re->rectx;
                        
                for (x = 0; x < re->rectx; x++, rf += 4) {
                        rf[0] = MAX2(rf[0], 0.0f);
                        rf[1] = MAX2(rf[1], 0.0f);
                        rf[2] = MAX2(rf[2], 0.0f);
                        CLAMP(rf[3], 0.0f, 1.0f);
                }
        }
        
        /* clear interaction callbacks */
        if (ntree) {
                ntree->stats_draw = NULL;
                ntree->test_break = NULL;
                ntree->progress = NULL;
                ntree->tbh = ntree->sdh = ntree->prh = NULL;
        }
        
        /* disable full sample print */
        R.i.curfsa = 0;
        
        BLI_rw_mutex_lock(&re->resultmutex, THREAD_LOCK_WRITE);
        if (re->result->rectf)
                MEM_freeN(re->result->rectf);
        re->result->rectf = rectf;
        BLI_rw_mutex_unlock(&re->resultmutex);
}

/* called externally, via compositor */
void RE_MergeFullSample(Render *re, Main *bmain, Scene *sce, bNodeTree *ntree)
{
        Scene *scene;
        bNode *node;

        /* default start situation */
        G.is_break = FALSE;
        
        re->main = bmain;
        re->scene = sce;
        re->scene_color_manage = BKE_scene_check_color_management_enabled(sce);
        
        /* first call RE_ReadRenderResult on every renderlayer scene. this creates Render structs */
        
        /* tag scenes unread */
        for (scene = re->main->scene.first; scene; scene = scene->id.next)
                scene->id.flag |= LIB_DOIT;
        
        for (node = ntree->nodes.first; node; node = node->next) {
                if (node->type == CMP_NODE_R_LAYERS) {
                        Scene *nodescene = (Scene *)node->id;
                        
                        if (nodescene == NULL) nodescene = sce;
                        if (nodescene->id.flag & LIB_DOIT) {
                                nodescene->r.mode |= R_OSA; /* render struct needs tables */
                                RE_ReadRenderResult(sce, nodescene);
                                nodescene->id.flag &= ~LIB_DOIT;
                        }
                }
        }
        
        /* own render result should be read/allocated */
        if (re->scene->id.flag & LIB_DOIT) {
                RE_ReadRenderResult(re->scene, re->scene);
                re->scene->id.flag &= ~LIB_DOIT;
        }
        
        /* and now we can draw (result is there) */
        re->display_init(re->dih, re->result);
        re->display_clear(re->dch, re->result);
        
        do_merge_fullsample(re, ntree);
}

/* returns fully composited render-result on given time step (in RenderData) */
static void do_render_composite_fields_blur_3d(Render *re)
{
        bNodeTree *ntree = re->scene->nodetree;
        int update_newframe = 0;
        
        /* INIT seeding, compositor can use random texture */
        BLI_srandom(re->r.cfra);
        
        if (composite_needs_render(re->scene, 1)) {
                /* save memory... free all cached images */
                ntreeFreeCache(ntree);
                
                do_render_fields_blur_3d(re);
        }
        else {
                /* ensure new result gets added, like for regular renders */
                BLI_rw_mutex_lock(&re->resultmutex, THREAD_LOCK_WRITE);
                
                render_result_free(re->result);
                re->result = render_result_new(re, &re->disprect, 0, RR_USE_MEM, RR_ALL_LAYERS);

                BLI_rw_mutex_unlock(&re->resultmutex);
                
                /* scene render process already updates animsys */
                update_newframe = 1;
        }
        
        /* swap render result */
        if (re->r.scemode & R_SINGLE_LAYER) {
                BLI_rw_mutex_lock(&re->resultmutex, THREAD_LOCK_WRITE);
                render_result_single_layer_end(re);
                BLI_rw_mutex_unlock(&re->resultmutex);
        }
        
        if (!re->test_break(re->tbh)) {
                
                if (ntree) {
                        ntreeCompositTagRender(re->scene);
                        ntreeCompositTagAnimated(ntree);
                }
                
                if (ntree && re->scene->use_nodes && re->r.scemode & R_DOCOMP) {
                        /* checks if there are render-result nodes that need scene */
                        if ((re->r.scemode & R_SINGLE_LAYER) == 0)
                                ntree_render_scenes(re);
                        
                        if (!re->test_break(re->tbh)) {
                                ntree->stats_draw = render_composit_stats;
                                ntree->test_break = re->test_break;
                                ntree->progress = re->progress;
                                ntree->sdh = re->sdh;
                                ntree->tbh = re->tbh;
                                ntree->prh = re->prh;
                                
                                /* in case it was never initialized */
                                R.sdh = re->sdh;
                                R.stats_draw = re->stats_draw;
                                
                                if (update_newframe)
                                        BKE_scene_update_for_newframe(re->main, re->scene, re->lay);
                                
                                if (re->r.scemode & R_FULL_SAMPLE)
                                        do_merge_fullsample(re, ntree);
                                else {
                                        ntreeCompositExecTree(ntree, &re->r, 1, G.background == 0, &re->scene->view_settings, &re->scene->display_settings);
                                }
                                
                                ntree->stats_draw = NULL;
                                ntree->test_break = NULL;
                                ntree->progress = NULL;
                                ntree->tbh = ntree->sdh = ntree->prh = NULL;
                        }
                }
                else if (re->r.scemode & R_FULL_SAMPLE)
                        do_merge_fullsample(re, NULL);
        }

        free_all_freestyle_renders(re->scene);

        /* weak... the display callback wants an active renderlayer pointer... */
        re->result->renlay = render_get_active_layer(re, re->result);
        re->display_draw(re->ddh, re->result, NULL);
}

static void renderresult_stampinfo(Render *re)
{
        RenderResult rres;

        /* this is the basic trick to get the displayed float or char rect from render result */
        RE_AcquireResultImage(re, &rres);
        BKE_stamp_buf(re->scene, RE_GetCamera(re), (unsigned char *)rres.rect32, rres.rectf, rres.rectx, rres.recty, 4);
        RE_ReleaseResultImage(re);
}

int RE_seq_render_active(Scene *scene, RenderData *rd)
{
        Editing *ed;
        Sequence *seq;

        ed = scene->ed;
        
        if (!(rd->scemode & R_DOSEQ) || !ed || !ed->seqbase.first)
                return 0;
        
        for (seq = ed->seqbase.first; seq; seq = seq->next) {
                if (seq->type != SEQ_TYPE_SOUND_RAM)
                        return 1;
        }
        
        return 0;
}

static void do_render_seq(Render *re)
{
        static int recurs_depth = 0;
        struct ImBuf *ibuf, *out;
        RenderResult *rr; /* don't assign re->result here as it might change during give_ibuf_seq */
        int cfra = re->r.cfra;
        SeqRenderData context;

        re->i.cfra = cfra;

        if (recurs_depth == 0) {
                /* otherwise sequencer animation isn't updated */
                BKE_animsys_evaluate_all_animation(re->main, re->scene, (float)cfra); // XXX, was BKE_scene_frame_get(re->scene)
        }

        recurs_depth++;

        if ((re->r.mode & R_BORDER) && (re->r.mode & R_CROP) == 0) {
                /* if border rendering is used and cropping is disabled, final buffer should
                 * be as large as the whole frame */
                context = BKE_sequencer_new_render_data(re->main, re->scene,
                                              re->winx, re->winy,
                                              100);
        }
        else {
                context = BKE_sequencer_new_render_data(re->main, re->scene,
                                              re->result->rectx, re->result->recty,
                                              100);
        }

        out = BKE_sequencer_give_ibuf(context, cfra, 0);

        if (out) {
                ibuf = IMB_dupImBuf(out);
                IMB_freeImBuf(out);
                BKE_sequencer_imbuf_from_sequencer_space(re->scene, ibuf);
        }
        else {
                ibuf = NULL;
        }

        recurs_depth--;

        rr = re->result;
        
        BLI_rw_mutex_lock(&re->resultmutex, THREAD_LOCK_WRITE);

        if (ibuf) {
                /* copy ibuf into combined pixel rect */
                render_result_rect_from_ibuf(rr, &re->r, ibuf);
                
                if (recurs_depth == 0) { /* with nested scenes, only free on toplevel... */
                        Editing *ed = re->scene->ed;
                        if (ed)
                                BKE_sequencer_free_imbuf(re->scene, &ed->seqbase, TRUE);
                }
                IMB_freeImBuf(ibuf);
        }
        else {
                /* render result is delivered empty in most cases, nevertheless we handle all cases */
                render_result_rect_fill_zero(rr);
        }

        BLI_rw_mutex_unlock(&re->resultmutex);

        /* just in case this flag went missing at some point */
        re->r.scemode |= R_DOSEQ;

        /* set overall progress of sequence rendering */
        if (re->r.efra != re->r.sfra)
                re->progress(re->prh, (float)(cfra - re->r.sfra) / (re->r.efra - re->r.sfra));
        else
                re->progress(re->prh, 1.0f);

        /* would mark display buffers as invalid */
        re->display_draw(re->ddh, re->result, NULL);
}

/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */

/* main loop: doing sequence + fields + blur + 3d render + compositing */
static void do_render_all_options(Render *re)
{
        BKE_scene_camera_switch_update(re->scene);

        re->i.starttime = PIL_check_seconds_timer();

        /* ensure no images are in memory from previous animated sequences */
        BKE_image_all_free_anim_ibufs(re->r.cfra);

        if (RE_engine_render(re, 1)) {
                /* in this case external render overrides all */
        }
        else if (RE_seq_render_active(re->scene, &re->r)) {
                /* note: do_render_seq() frees rect32 when sequencer returns float images */
                if (!re->test_break(re->tbh))
                        do_render_seq(re);
                
                re->stats_draw(re->sdh, &re->i);
                re->display_draw(re->ddh, re->result, NULL);
        }
        else {
                do_render_composite_fields_blur_3d(re);
        }
        
        re->i.lastframetime = PIL_check_seconds_timer() - re->i.starttime;
        
        re->stats_draw(re->sdh, &re->i);
        
        /* stamp image info here */
        if ((re->r.stamp & R_STAMP_ALL) && (re->r.stamp & R_STAMP_DRAW)) {
                renderresult_stampinfo(re);
                re->display_draw(re->ddh, re->result, NULL);
        }
}

static int check_valid_camera(Scene *scene, Object *camera_override)
{
        int check_comp = 1;

        if (camera_override == NULL && scene->camera == NULL)
                scene->camera = BKE_scene_camera_find(scene);

        if (scene->r.scemode & R_DOSEQ) {
                if (scene->ed) {
                        Sequence *seq = scene->ed->seqbase.first;

                        check_comp = 0;

                        while (seq) {
                                if (seq->type == SEQ_TYPE_SCENE && seq->scene) {
                                        if (!seq->scene_camera) {
                                                if (!seq->scene->camera && !BKE_scene_camera_find(seq->scene)) {
                                                        if (seq->scene == scene) {
                                                                /* for current scene camera could be unneeded due to compisite nodes */
                                                                check_comp = 1;
                                                        }
                                                        else {
                                                                /* for other scenes camera is necessary */
                                                                return 0;
                                                        }
                                                }
                                        }
                                }

                                seq = seq->next;
                        }
                }
        }

        if (check_comp) { /* no sequencer or sequencer depends on compositor */
                if (scene->r.scemode & R_DOCOMP && scene->use_nodes) {
                        bNode *node = scene->nodetree->nodes.first;

                        while (node) {
                                if (node->type == CMP_NODE_R_LAYERS) {
                                        Scene *sce = node->id ? (Scene *)node->id : scene;

                                        if (!sce->camera && !BKE_scene_camera_find(sce)) {
                                                /* all render layers nodes need camera */
                                                return 0;
                                        }
                                }

                                node = node->next;
                        }
                }
                else {
                        return (camera_override != NULL || scene->camera != NULL);
                }
        }

        return 1;
}

static int node_tree_has_composite_output(bNodeTree *ntree)
{
        bNode *node;

        for (node = ntree->nodes.first; node; node = node->next) {
                if (node->type == CMP_NODE_COMPOSITE) {
                        return TRUE;
                }
                else if (node->type == NODE_GROUP) {
                        if (node->id) {
                                if (node_tree_has_composite_output((bNodeTree *)node->id)) {
                                        return TRUE;
                                }
                        }
                }
        }

        return FALSE;
}

static int check_composite_output(Scene *scene)
{
        return node_tree_has_composite_output(scene->nodetree);
}

int RE_is_rendering_allowed(Scene *scene, Object *camera_override, ReportList *reports)
{
        SceneRenderLayer *srl;
        
        if (scene->r.mode & R_BORDER) {
                if (scene->r.border.xmax <= scene->r.border.xmin ||
                    scene->r.border.ymax <= scene->r.border.ymin)
                {
                        BKE_report(reports, RPT_ERROR, "No border area selected");
                        return 0;
                }
        }
        
        if (scene->r.scemode & (R_EXR_TILE_FILE | R_FULL_SAMPLE)) {
                char str[FILE_MAX];
                
                render_result_exr_file_path(scene, "", 0, str);
                
                if (BLI_file_is_writable(str) == 0) {
                        BKE_report(reports, RPT_ERROR, "Cannot save render buffers, check the temp default path");
                        return 0;
                }
                
                /* no fullsample and edge */
                if ((scene->r.scemode & R_FULL_SAMPLE) && (scene->r.mode & R_EDGE)) {
                        BKE_report(reports, RPT_ERROR, "Full sample does not support edge enhance");
                        return 0;
                }
                
        }
        else
                scene->r.scemode &= ~R_FULL_SAMPLE;  /* clear to be sure */
        
        if (scene->r.scemode & R_DOCOMP) {
                if (scene->use_nodes) {
                        if (!scene->nodetree) {
                                BKE_report(reports, RPT_ERROR, "No node tree in scene");
                                return 0;
                        }
                        
                        if (!check_composite_output(scene)) {
                                BKE_report(reports, RPT_ERROR, "No render output node in scene");
                                return 0;
                        }
                        
                        if (scene->r.scemode & R_FULL_SAMPLE) {
                                if (composite_needs_render(scene, 0) == 0) {
                                        BKE_report(reports, RPT_ERROR, "Full sample AA not supported without 3D rendering");
                                        return 0;
                                }
                        }
                }
        }
        
        /* check valid camera, without camera render is OK (compo, seq) */
        if (!check_valid_camera(scene, camera_override)) {
                BKE_report(reports, RPT_ERROR, "No camera");
                return 0;
        }
        
        /* get panorama & ortho, only after camera is set */
        BKE_camera_object_mode(&scene->r, camera_override ? camera_override : scene->camera);

        /* forbidden combinations */
        if (scene->r.mode & R_PANORAMA) {
                if (scene->r.mode & R_ORTHO) {
                        BKE_report(reports, RPT_ERROR, "No ortho render possible for panorama");
                        return 0;
                }
        }

        /* layer flag tests */
        if (scene->r.scemode & R_SINGLE_LAYER) {
                srl = BLI_findlink(&scene->r.layers, scene->r.actlay);
                /* force layer to be enabled */
                srl->layflag &= ~SCE_LAY_DISABLE;
        }
        
        for (srl = scene->r.layers.first; srl; srl = srl->next)
                if (!(srl->layflag & SCE_LAY_DISABLE))
                        break;
        if (srl == NULL) {
                BKE_report(reports, RPT_ERROR, "All render layers are disabled");
                return 0;
        }

        return 1;
}

static void validate_render_settings(Render *re)
{
        if (re->r.scemode & (R_EXR_TILE_FILE | R_FULL_SAMPLE)) {
                /* no osa + fullsample won't work... */
                if (re->r.osa == 0)
                        re->r.scemode &= ~R_FULL_SAMPLE;
        }
        else re->r.scemode &= ~R_FULL_SAMPLE;   /* clear to be sure */

        if (RE_engine_is_external(re)) {
                /* not supported yet */
                re->r.scemode &= ~(R_FULL_SAMPLE);
                re->r.mode &= ~(R_FIELDS | R_MBLUR);
        }
}

static void update_physics_cache(Render *re, Scene *scene, int UNUSED(anim_init))
{
        PTCacheBaker baker;

        baker.main = re->main;
        baker.scene = scene;
        baker.pid = NULL;
        baker.bake = 0;
        baker.render = 1;
        baker.anim_init = 1;
        baker.quick_step = 1;
        baker.break_test = re->test_break;
        baker.break_data = re->tbh;
        baker.progressbar = NULL;

        BKE_ptcache_bake(&baker);
}
/* evaluating scene options for general Blender render */
static int render_initialize_from_main(Render *re, Main *bmain, Scene *scene, SceneRenderLayer *srl, Object *camera_override, unsigned int lay, int anim, int anim_init)
{
        int winx, winy;
        rcti disprect;
        
        /* r.xsch and r.ysch has the actual view window size
         * r.border is the clipping rect */
        
        /* calculate actual render result and display size */
        winx = (scene->r.size * scene->r.xsch) / 100;
        winy = (scene->r.size * scene->r.ysch) / 100;
        
        /* we always render smaller part, inserting it in larger image is compositor bizz, it uses disprect for it */
        if (scene->r.mode & R_BORDER) {
                disprect.xmin = scene->r.border.xmin * winx;
                disprect.xmax = scene->r.border.xmax * winx;
                
                disprect.ymin = scene->r.border.ymin * winy;
                disprect.ymax = scene->r.border.ymax * winy;
        }
        else {
                disprect.xmin = disprect.ymin = 0;
                disprect.xmax = winx;
                disprect.ymax = winy;
        }
        
        re->main = bmain;
        re->scene = scene;
        re->scene_color_manage = BKE_scene_check_color_management_enabled(scene);
        re->camera_override = camera_override;
        re->lay = lay;
        
        /* not too nice, but it survives anim-border render */
        if (anim) {
                re->disprect = disprect;
                return 1;
        }
        
        /* check all scenes involved */
        tag_scenes_for_render(re);

        /*
         * Disabled completely for now,
         * can be later set as render profile option
         * and default for background render.
         */
        if (0) {
                /* make sure dynamics are up to date */
                update_physics_cache(re, scene, anim_init);
        }
        
        if (srl || scene->r.scemode & R_SINGLE_LAYER) {
                BLI_rw_mutex_lock(&re->resultmutex, THREAD_LOCK_WRITE);
                render_result_single_layer_begin(re);
                BLI_rw_mutex_unlock(&re->resultmutex);
        }
        
        RE_InitState(re, NULL, &scene->r, srl, winx, winy, &disprect);
        if (!re->ok)  /* if an error was printed, abort */
                return 0;
        
        /* initstate makes new result, have to send changed tags around */
        ntreeCompositTagRender(re->scene);

        validate_render_settings(re);

        re->display_init(re->dih, re->result);
        re->display_clear(re->dch, re->result);
        
        return 1;
}

void RE_SetReports(Render *re, ReportList *reports)
{
        re->reports = reports;
}

/* general Blender frame render call */
void RE_BlenderFrame(Render *re, Main *bmain, Scene *scene, SceneRenderLayer *srl, Object *camera_override, unsigned int lay, int frame, const short write_still)
{
        /* ugly global still... is to prevent preview events and signal subsurfs etc to make full resol */
        G.is_rendering = TRUE;
        
        scene->r.cfra = frame;
        
        if (render_initialize_from_main(re, bmain, scene, srl, camera_override, lay, 0, 0)) {
                MEM_reset_peak_memory();

                BLI_callback_exec(re->main, (ID *)scene, BLI_CB_EVT_RENDER_PRE);

                do_render_all_options(re);
                
                if (write_still && !G.is_break) {
                        if (BKE_imtype_is_movie(scene->r.im_format.imtype)) {
                                /* operator checks this but in case its called from elsewhere */
                                printf("Error: cant write single images with a movie format!\n");
                        }
                        else {
                                char name[FILE_MAX];
                                BKE_makepicstring(name, scene->r.pic, bmain->name, scene->r.cfra, scene->r.im_format.imtype, scene->r.scemode & R_EXTENSION, FALSE);

                                /* reports only used for Movie */
                                do_write_image_or_movie(re, bmain, scene, NULL, name);
                        }
                }

                BLI_callback_exec(re->main, (ID *)scene, BLI_CB_EVT_RENDER_POST); /* keep after file save */
        }

        BLI_callback_exec(re->main, (ID *)scene, G.is_break ? BLI_CB_EVT_RENDER_CANCEL : BLI_CB_EVT_RENDER_COMPLETE);

        /* UGLY WARNING */
        G.is_rendering = FALSE;
}

void RE_RenderFreestyleStrokes(Render *re, Main *bmain, Scene *scene)
{
        re->result_ok= 0;
        if(render_initialize_from_main(re, bmain, scene, NULL, NULL, scene->lay, 0, 0)) {
                do_render_fields_blur_3d(re);
        }
        re->result_ok= 1;
}

static int do_write_image_or_movie(Render *re, Main *bmain, Scene *scene, bMovieHandle *mh, const char *name_override)
{
        char name[FILE_MAX];
        RenderResult rres;
        Object *camera = RE_GetCamera(re);
        int ok = 1;
        
        RE_AcquireResultImage(re, &rres);

        /* write movie or image */
        if (BKE_imtype_is_movie(scene->r.im_format.imtype)) {
                int do_free = FALSE;
                ImBuf *ibuf = render_result_rect_to_ibuf(&rres, &scene->r);

                /* note; the way it gets 32 bits rects is weak... */
                if (ibuf->rect == NULL) {
                        ibuf->rect = MEM_mapallocN(sizeof(int) * rres.rectx * rres.recty, "temp 32 bits rect");
                        ibuf->mall |= IB_rect;
                        RE_ResultGet32(re, ibuf->rect);
                        do_free = TRUE;
                }


                IMB_colormanagement_imbuf_for_write(ibuf, TRUE, FALSE, &scene->view_settings,
                                                    &scene->display_settings, &scene->r.im_format);

                ok = mh->append_movie(&re->r, scene->r.sfra, scene->r.cfra, (int *) ibuf->rect,
                                      ibuf->x, ibuf->y, re->reports);
                if (do_free) {
                        MEM_freeN(ibuf->rect);
                        ibuf->rect = NULL;
                        ibuf->mall &= ~IB_rect;
                }

                /* imbuf knows which rects are not part of ibuf */
                IMB_freeImBuf(ibuf);

                printf("Append frame %d", scene->r.cfra);
        }
        else {
                if (name_override)
                        BLI_strncpy(name, name_override, sizeof(name));
                else
                        BKE_makepicstring(name, scene->r.pic, bmain->name, scene->r.cfra, scene->r.im_format.imtype, scene->r.scemode & R_EXTENSION, TRUE);
                
                if (re->r.im_format.imtype == R_IMF_IMTYPE_MULTILAYER) {
                        if (re->result) {
                                RE_WriteRenderResult(re->reports, re->result, name, scene->r.im_format.exr_codec);
                                printf("Saved: %s", name);
                        }
                }
                else {
                        ImBuf *ibuf = render_result_rect_to_ibuf(&rres, &scene->r);

                        IMB_colormanagement_imbuf_for_write(ibuf, TRUE, FALSE, &scene->view_settings,
                                                            &scene->display_settings, &scene->r.im_format);

                        ok = BKE_imbuf_write_stamp(scene, camera, ibuf, name, &scene->r.im_format);
                        
                        if (ok == 0) {
                                printf("Render error: cannot save %s\n", name);
                        }
                        else printf("Saved: %s", name);
                        
                        /* optional preview images for exr */
                        if (ok && scene->r.im_format.imtype == R_IMF_IMTYPE_OPENEXR && (scene->r.im_format.flag & R_IMF_FLAG_PREVIEW_JPG)) {
                                ImageFormatData imf = scene->r.im_format;
                                imf.imtype = R_IMF_IMTYPE_JPEG90;

                                if (BLI_testextensie(name, ".exr"))
                                        name[strlen(name) - 4] = 0;
                                BKE_add_image_extension(name, R_IMF_IMTYPE_JPEG90);
                                ibuf->planes = 24;

                                IMB_colormanagement_imbuf_for_write(ibuf, TRUE, FALSE, &scene->view_settings,
                                                                    &scene->display_settings, &imf);

                                BKE_imbuf_write_stamp(scene, camera, ibuf, name, &imf);
                                printf("\nSaved: %s", name);
                        }
                        
                        /* imbuf knows which rects are not part of ibuf */
                        IMB_freeImBuf(ibuf);
                }
        }
        
        RE_ReleaseResultImage(re);

        BLI_timestr(re->i.lastframetime, name);
        printf(" Time: %s", name);

        BLI_callback_exec(G.main, NULL, BLI_CB_EVT_RENDER_STATS);

        fputc('\n', stdout);
        fflush(stdout); /* needed for renderd !! (not anymore... (ton)) */

        return ok;
}

/* saves images to disk */
void RE_BlenderAnim(Render *re, Main *bmain, Scene *scene, Object *camera_override, unsigned int lay, int sfra, int efra, int tfra)
{
        bMovieHandle *mh = BKE_movie_handle_get(scene->r.im_format.imtype);
        int cfrao = scene->r.cfra;
        int nfra, totrendered = 0, totskipped = 0;
        
        /* do not fully call for each frame, it initializes & pops output window */
        if (!render_initialize_from_main(re, bmain, scene, NULL, camera_override, lay, 0, 1))
                return;
        
        /* ugly global still... is to prevent renderwin events and signal subsurfs etc to make full resol */
        /* is also set by caller renderwin.c */
        G.is_rendering = TRUE;

        re->flag |= R_ANIMATION;

        if (BKE_imtype_is_movie(scene->r.im_format.imtype))
                if (!mh->start_movie(scene, &re->r, re->rectx, re->recty, re->reports))
                        G.is_break = TRUE;

        if (mh->get_next_frame) {
                while (!(G.is_break == 1)) {
                        int nf = mh->get_next_frame(&re->r, re->reports);
                        if (nf >= 0 && nf >= scene->r.sfra && nf <= scene->r.efra) {
                                scene->r.cfra = re->r.cfra = nf;

                                BLI_callback_exec(re->main, (ID *)scene, BLI_CB_EVT_RENDER_PRE);

                                do_render_all_options(re);
                                totrendered++;

                                if (re->test_break(re->tbh) == 0) {
                                        if (!do_write_image_or_movie(re, bmain, scene, mh, NULL))
                                                G.is_break = TRUE;
                                }

                                if (G.is_break == FALSE) {
                                        BLI_callback_exec(re->main, (ID *)scene, BLI_CB_EVT_RENDER_POST); /* keep after file save */
                                }
                        }
                        else {
                                if (re->test_break(re->tbh)) {
                                        G.is_break = TRUE;
                                }
                        }
                }
        }
        else {
                for (nfra = sfra, scene->r.cfra = sfra; scene->r.cfra <= efra; scene->r.cfra++) {
                        char name[FILE_MAX];
                        
                        /* only border now, todo: camera lens. (ton) */
                        render_initialize_from_main(re, bmain, scene, NULL, camera_override, lay, 1, 0);

                        if (nfra != scene->r.cfra) {
                                /*
                                 * Skip this frame, but update for physics and particles system.
                                 * From convertblender.c:
                                 * in localview, lamps are using normal layers, objects only local bits.
                                 */
                                unsigned int updatelay;

                                if (re->lay & 0xFF000000)
                                        updatelay = re->lay & 0xFF000000;
                                else
                                        updatelay = re->lay;

                                BKE_scene_update_for_newframe(bmain, scene, updatelay);
                                continue;
                        }
                        else
                                nfra += tfra;

                        /* Touch/NoOverwrite options are only valid for image's */
                        if (BKE_imtype_is_movie(scene->r.im_format.imtype) == 0) {
                                if (scene->r.mode & (R_NO_OVERWRITE | R_TOUCH))
                                        BKE_makepicstring(name, scene->r.pic, bmain->name, scene->r.cfra, scene->r.im_format.imtype, scene->r.scemode & R_EXTENSION, TRUE);

                                if (scene->r.mode & R_NO_OVERWRITE && BLI_exists(name)) {
                                        printf("skipping existing frame \"%s\"\n", name);
                                        totskipped++;
                                        continue;
                                }
                                if (scene->r.mode & R_TOUCH && !BLI_exists(name)) {
                                        BLI_make_existing_file(name); /* makes the dir if its not there */
                                        BLI_file_touch(name);
                                }
                        }

                        re->r.cfra = scene->r.cfra;     /* weak.... */

                        /* run callbacs before rendering, before the scene is updated */
                        BLI_callback_exec(re->main, (ID *)scene, BLI_CB_EVT_RENDER_PRE);

                        
                        do_render_all_options(re);
                        totrendered++;
                        
                        if (re->test_break(re->tbh) == 0) {
                                if (!G.is_break)
                                        if (!do_write_image_or_movie(re, bmain, scene, mh, NULL))
                                                G.is_break = TRUE;
                        }
                        else
                                G.is_break = TRUE;
                
                        if (G.is_break == TRUE) {
                                /* remove touched file */
                                if (BKE_imtype_is_movie(scene->r.im_format.imtype) == 0) {
                                        if (scene->r.mode & R_TOUCH && BLI_exists(name) && BLI_file_size(name) == 0) {
                                                BLI_delete(name, 0, 0);
                                        }
                                }
                                
                                break;
                        }

                        if (G.is_break == FALSE) {
                                BLI_callback_exec(re->main, (ID *)scene, BLI_CB_EVT_RENDER_POST); /* keep after file save */
                        }
                }
        }
        
        /* end movie */
        if (BKE_imtype_is_movie(scene->r.im_format.imtype))
                mh->end_movie();
        
        if (totskipped && totrendered == 0)
                BKE_report(re->reports, RPT_INFO, "No frames rendered, skipped to not overwrite");

        scene->r.cfra = cfrao;

        re->flag &= ~R_ANIMATION;

        BLI_callback_exec(re->main, (ID *)scene, G.is_break ? BLI_CB_EVT_RENDER_CANCEL : BLI_CB_EVT_RENDER_COMPLETE);

        /* UGLY WARNING */
        G.is_rendering = FALSE;
}

void RE_PreviewRender(Render *re, Main *bmain, Scene *sce)
{
        Object *camera;
        int winx, winy;

        winx = (sce->r.size * sce->r.xsch) / 100;
        winy = (sce->r.size * sce->r.ysch) / 100;

        RE_InitState(re, NULL, &sce->r, NULL, winx, winy, NULL);

        re->main = bmain;
        re->scene = sce;
        re->scene_color_manage = BKE_scene_check_color_management_enabled(sce);
        re->lay = sce->lay;

        camera = RE_GetCamera(re);
        RE_SetCamera(re, camera);

        do_render_3d(re);
}

/* note; repeated win/disprect calc... solve that nicer, also in compo */

/* only the temp file! */
int RE_ReadRenderResult(Scene *scene, Scene *scenode)
{
        Render *re;
        int winx, winy, success;
        rcti disprect;
        
        /* calculate actual render result and display size */
        winx = (scene->r.size * scene->r.xsch) / 100;
        winy = (scene->r.size * scene->r.ysch) / 100;
        
        /* only in movie case we render smaller part */
        if (scene->r.mode & R_BORDER) {
                disprect.xmin = scene->r.border.xmin * winx;
                disprect.xmax = scene->r.border.xmax * winx;
                
                disprect.ymin = scene->r.border.ymin * winy;
                disprect.ymax = scene->r.border.ymax * winy;
        }
        else {
                disprect.xmin = disprect.ymin = 0;
                disprect.xmax = winx;
                disprect.ymax = winy;
        }
        
        if (scenode)
                scene = scenode;
        
        /* get render: it can be called from UI with draw callbacks */
        re = RE_GetRender(scene->id.name);
        if (re == NULL)
                re = RE_NewRender(scene->id.name);
        RE_InitState(re, NULL, &scene->r, NULL, winx, winy, &disprect);
        re->scene = scene;
        re->scene_color_manage = BKE_scene_check_color_management_enabled(scene);
        
        BLI_rw_mutex_lock(&re->resultmutex, THREAD_LOCK_WRITE);
        success = render_result_exr_file_read(re, 0);
        BLI_rw_mutex_unlock(&re->resultmutex);

        return success;
}

void RE_set_max_threads(int threads)
{
        if (threads == 0) {
                RenderGlobal.threads = BLI_system_thread_count();
        }
        else if (threads >= 1 && threads <= BLENDER_MAX_THREADS) {
                RenderGlobal.threads = threads;
        }
        else {
                printf("Error, threads has to be in range 0-%d\n", BLENDER_MAX_THREADS);
        }
}

void RE_init_threadcount(Render *re) 
{
        if (RenderGlobal.threads >= 1) { /* only set as an arg in background mode */
                re->r.threads = MIN2(RenderGlobal.threads, BLENDER_MAX_THREADS);
        }
        else if ((re->r.mode & R_FIXED_THREADS) == 0 || RenderGlobal.threads == 0) { /* Automatic threads */
                re->r.threads = BLI_system_thread_count();
        }
}

/* loads in image into a result, size must match
 * x/y offsets are only used on a partial copy when dimensions don't match */
void RE_layer_load_from_file(RenderLayer *layer, ReportList *reports, const char *filename, int x, int y)
{
        /* OCIO_TODO: assume layer was saved in defaule color space */
        ImBuf *ibuf = IMB_loadiffname(filename, IB_rect, NULL);

        if (ibuf && (ibuf->rect || ibuf->rect_float)) {
                if (ibuf->x == layer->rectx && ibuf->y == layer->recty) {
                        if (ibuf->rect_float == NULL)
                                IMB_float_from_rect(ibuf);

                        memcpy(layer->rectf, ibuf->rect_float, sizeof(float) * 4 * layer->rectx * layer->recty);
                }
                else {
                        if ((ibuf->x - x >= layer->rectx) && (ibuf->y - y >= layer->recty)) {
                                ImBuf *ibuf_clip;

                                if (ibuf->rect_float == NULL)
                                        IMB_float_from_rect(ibuf);

                                ibuf_clip = IMB_allocImBuf(layer->rectx, layer->recty, 32, IB_rectfloat);
                                if (ibuf_clip) {
                                        IMB_rectcpy(ibuf_clip, ibuf, 0, 0, x, y, layer->rectx, layer->recty);

                                        memcpy(layer->rectf, ibuf_clip->rect_float, sizeof(float) * 4 * layer->rectx * layer->recty);
                                        IMB_freeImBuf(ibuf_clip);
                                }
                                else {
                                        BKE_reportf(reports, RPT_ERROR, "RE_result_rect_from_file: failed to allocate clip buffer '%s'", filename);
                                }
                        }
                        else {
                                BKE_reportf(reports, RPT_ERROR, "RE_result_rect_from_file: incorrect dimensions for partial copy '%s'", filename);
                        }
                }

                IMB_freeImBuf(ibuf);
        }
        else {
                BKE_reportf(reports, RPT_ERROR, "RE_result_rect_from_file: failed to load '%s'", filename);
        }
}

void RE_result_load_from_file(RenderResult *result, ReportList *reports, const char *filename)
{
        if (!render_result_exr_file_read_path(result, NULL, filename)) {
                BKE_reportf(reports, RPT_ERROR, "RE_result_rect_from_file: failed to load '%s'", filename);
                return;
        }
}

const float default_envmap_layout[] = { 0, 0, 1, 0, 2, 0, 0, 1, 1, 1, 2, 1 };

int RE_WriteEnvmapResult(struct ReportList *reports, Scene *scene, EnvMap *env, const char *relpath, const char imtype, float layout[12])
{
        ImageFormatData imf;
        ImBuf *ibuf = NULL;
        int ok;
        int dx;
        int maxX = 0, maxY = 0, i = 0;
        char filepath[FILE_MAX];

        if (env->cube[1] == NULL) {
                BKE_report(reports, RPT_ERROR, "There is no generated environment map available to save");
                return 0;
        }

        imf = scene->r.im_format;
        imf.imtype = imtype;

        dx = env->cube[1]->x;

        if (env->type == ENV_CUBE) {
                for (i = 0; i < 12; i += 2) {
                        maxX = max_ii(maxX, (int)layout[i] + 1);
                        maxY = max_ii(maxY, (int)layout[i + 1] + 1);
                }

                ibuf = IMB_allocImBuf(maxX * dx, maxY * dx, 24, IB_rectfloat);

                for (i = 0; i < 12; i += 2)
                        if (layout[i] > -1 && layout[i + 1] > -1)
                                IMB_rectcpy(ibuf, env->cube[i / 2], layout[i] * dx, layout[i + 1] * dx, 0, 0, dx, dx);
        }
        else if (env->type == ENV_PLANE) {
                ibuf = IMB_allocImBuf(dx, dx, 24, IB_rectfloat);
                IMB_rectcpy(ibuf, env->cube[1], 0, 0, 0, 0, dx, dx);
        }
        else {
                BKE_report(reports, RPT_ERROR, "Invalid environment map type");
                return 0;
        }

        IMB_colormanagement_imbuf_for_write(ibuf, TRUE, FALSE, &scene->view_settings, &scene->display_settings, &imf);

        /* to save, we first get absolute path */
        BLI_strncpy(filepath, relpath, sizeof(filepath));
        BLI_path_abs(filepath, G.main->name);

        ok = BKE_imbuf_write(ibuf, filepath, &imf);

        IMB_freeImBuf(ibuf);

        if (ok) {
                return TRUE;
        }
        else {
                BKE_report(reports, RPT_ERROR, "Error writing environment map");
                return FALSE;
        }
}